10-u=9

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Solution for 10-u=9 equation: 


Simplifying
10 + -1u = 9

Solving
10 + -1u = 9

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '-10' to each side of the equation.
10 + -10 + -1u = 9 + -10

Combine like terms: 10 + -10 = 0
0 + -1u = 9 + -10
-1u = 9 + -10

Combine like terms: 9 + -10 = -1
-1u = -1

Divide each side by '-1'.
u = 1

Simplifying
u = 1

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